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Normative values for ureteral diameter in children
Kumar K Shashi1, Ted Lee2, Sila Kurugol3
1Department of Radiology, Boston Children's Hospital, 300 Longwood Ave., Boston, MA, 02116, USA. drkumargowda@gmail.com.
Pediatric Radiology
|April 7, 2022
Summary
This study establishes normative ureteral diameter values for children using MR urography. The average widest internal ureteral diameter in pediatric patients is 3.8 mm, with variations based on age and sex.
Area of Science:
- Pediatric Radiology
- Urology
- Medical Imaging
Background:
- Ureteral assessment is crucial for evaluating urinary tract abnormalities like obstruction and reflux.
- Current imaging practices lack established normative ureteral diameter values for pediatric patients.
- This deficiency hinders accurate diagnosis and management of pediatric urinary tract conditions.
Purpose of the Study:
- To establish age-related normative values for ureteral diameter in pediatric patients.
- To provide a reference standard for interpreting ureteral dimensions in children.
- To aid in the diagnosis of conditions causing abnormal ureteral dilation.
Main Methods:
- Retrospective review of 121 magnetic resonance (MR) urography studies.
- Analysis of 160 normal ureter units using specialized imaging software for maximum internal diameter measurement.
- Calculation of average widest internal ureteral diameter and statistical analysis for age, sex, and laterality associations.
Main Results:
- Ureteral diameter progressively increases with age, from 3.2 mm in infancy to 5.0 mm in adolescents.
- After age 9, males exhibit slightly larger ureteral diameters than females (OR=1.91).
- The right ureter is marginally larger than the left (3.9 mm vs. 3.7 mm).
Conclusions:
- The study provides normative values for average widest internal ureteral diameter in pediatric patients.
- A threshold of 3.8 mm is proposed as the average widest internal ureteral diameter for the pediatric population.
- These findings offer essential reference data for pediatric radiologists and urologists.
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